Synonyms: insuperable, insurmountable
Definition: impossible to surmount
Similar words: unconquerable
Definition: not capable of being conquered or vanquished or overcome
Usage: a tribute to his courage...and his unconquerable will- R.E.Danielson; faced unconquerable difficulties
Synonyms: insuperable, unconquerable
Definition: incapable of being surmounted or excelled
Usage: insuperable odds; insuperable heroes
Similar words: unsurmountable, insurmountable
Definition: not capable of being surmounted or overcome
Usage: insurmountable disadvantages